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Very high resolution image matching based on local features and k-means clustering / Amin Sedaghat in Photogrammetric record, vol 30 n° 150 (June - August 2015)  

Public [article]  inPhotogrammetric record > vol 30 n° 150 (June - August 2015) . - pp 166 - 186 Titre : Very high resolution image matching based on local features and k-means clustering Type de document : Article/Communication Auteurs : Amin Sedaghat, Auteur ; Hamid Ebadi, Auteur Année de publication : 2015 Article en page(s) : pp 166 - 186 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique [Termes IGN] appariement d'images [Termes IGN] distance euclidienne [Termes IGN] extraction de traits caractéristiques [Termes IGN] image à très haute résolution [Termes IGN] partitionnement [Termes IGN] primitive géométrique Résumé : (Auteur) Image matching is a critical process in photogrammetry and remote sensing. Automatic and reliable feature matching using well-distributed points in very high resolution images is a difficult task due to significant relief displacement caused by tall buildings and ground relief. In this paper a robust and efficient image-matching approach is proposed, consisting of two main steps. In the first step, three sets of local features – Harris points, UR-SIFT and MSER – are extracted over the entire image. A SIFT (scale-invariant feature transform) descriptor is then created for each extracted feature, and an initial cross-matching verification is performed using the Euclidean distance between feature descriptors. In the second step, an approach based on k-means clustering is performed to achieve accurate matching without mismatched features, followed by a consistency check using a local affine transformation model for each cluster. The proposed method is successfully applied to matching various aerial and satellite images and the results demonstrate its robustness and capability. Numéro de notice : A2015-366 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1111/phor.12101 Date de publication en ligne : 29/06/2015 En ligne : https://doi.org/10.1111/phor.12101 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=76908 [article]

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106-2015021	RAB	Revue	Centre de documentation	En réserve L003	Disponible

In-orbit geometric calibration and validation of ZY-3 three-line cameras based on CCD-detector look angles / Jinshan Cao in Photogrammetric record, vol 30 n° 150 (June - August 2015)  

Public [article]  inPhotogrammetric record > vol 30 n° 150 (June - August 2015) . - pp 211 - 226 Titre : In-orbit geometric calibration and validation of ZY-3 three-line cameras based on CCD-detector look angles Type de document : Article/Communication Auteurs : Jinshan Cao, Auteur ; Xiuxiao Yuan, Auteur ; Jianya Gong, Auteur Année de publication : 2015 Article en page(s) : pp 211 - 226 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s) [Termes IGN] angle de visée [Termes IGN] caméra matricielle [Termes IGN] capteur en peigne [Termes IGN] chambre DTC [Termes IGN] étalonnage de capteur (imagerie) [Termes IGN] étalonnage en vol [Termes IGN] étalonnage géométrique [Termes IGN] géoréférencement direct [Termes IGN] image ZiYuan-3 [Termes IGN] précision du positionnement Résumé : (Auteur) A simple and feasible orientation method for the three-line cameras of the ZiYuan-3 (ZY-3) satellite is introduced. The method calibrates the CCD-detector look angles in the attitude determination reference (ADR) coordinate system rather than modifying the laboratory-calibrated orientation parameters, which are not necessary for the geometric calibration. Additionally, the unknown parameters of the model are virtually uncorrelated. Experimental results show that the direct georeferencing accuracy of ZY-3 nadir images have been improved from the kilometre level to better than 9 m in planimetry, and that of the forward-and-backward stereopair was also raised to better than 18 m in plan and 4 m in height. After a bundle adjustment using four ground control points, a higher accuracy of about 3·4 m in plan and 1·6 m in height was achieved. Numéro de notice : A2015-367 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1111/phor.12101 Date de publication en ligne : 16/04/2015 En ligne : https://doi.org/10.1111/phor.12101 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=76909 [article]

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Simplifying photogrammetric analysis for assessment of large mammal mass : automated targeting and 3D model building / L. Catherine Bester in Photogrammetric record, vol 30 n° 150 (June - August 2015)  

Public [article]  inPhotogrammetric record > vol 30 n° 150 (June - August 2015) . - pp 227 - 241 Titre : Simplifying photogrammetric analysis for assessment of large mammal mass : automated targeting and 3D model building Type de document : Article/Communication Auteurs : L. Catherine Bester, Auteur ; P. J. Nico de Bruyn, Auteur Année de publication : 2015 Article en page(s) : pp 227 - 241 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie terrestre [Termes IGN] analyse combinatoire (maths) [Termes IGN] biologie [Termes IGN] logiciel de photogrammétrie [Termes IGN] Mammalia [Termes IGN] masse [Termes IGN] objet mobile [Termes IGN] population animale Résumé : (Auteur) Close range photogrammetry has increasingly diverse practical application within the biological sciences. Its use in large mammal research for size and/or mass estimation has proven extremely beneficial. Recent photogrammetric technique advancements have improved its applicability in the field, although some analytical components remain time consuming. The use of automated coded targets, associated with commercially available software, was evaluated to simplify photogrammetric analysis without compromising its practicality. The effects of variable target size and shape, lighting conditions, number of photographs, photograph target coverage and project processing time were assessed. Augmenting a published photogrammetric field technique by including coded targets greatly reduced analysis time. The simplified method is attractive for use by a wider range of both specialist and non-specialist users for applications within the animal photogrammetry field. Numéro de notice : A2015-368 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1111/phor.12102 Date de publication en ligne : 14/06/2015 En ligne : https://doi.org/10.1111/phor.12102 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=76910 [article]

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106-2015021	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Application of archival aerial photogrammetry to quantify climate forcing of alpine landscapes / Natan Micheletti in Photogrammetric record, vol 30 n° 150 (June - August 2015)  

Public [article]  inPhotogrammetric record > vol 30 n° 150 (June - August 2015) . - pp 143 - 165 Titre : Application of archival aerial photogrammetry to quantify climate forcing of alpine landscapes Type de document : Article/Communication Auteurs : Natan Micheletti, Auteur ; Stuart Lane, Auteur ; Jim H. Chandler, Auteur Année de publication : 2015 Article en page(s) : pp 143 - 165 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications photogrammétriques [Termes IGN] Alpes [Termes IGN] analyse diachronique [Termes IGN] changement climatique [Termes IGN] érosion [Termes IGN] image aérienne [Termes IGN] montagne [Termes IGN] Suisse [Termes IGN] traitement d'image Résumé : (auteur) Recent and future climate change may lead to landscape changes in geomorphic processes and process rates. Such modifications are likely to be widely distributed, making their direct measurement difficult and there are almost no such measurements at decadal intervals. Aerial imagery has been acquired by many national agencies since the 1950s and significant archives remain. Unlocking the information from these data sources is important because their timescale may inform significant unresolved hypotheses regarding the impact of rapid climate change on Alpine environments. However, such photogrammetric applications are challenging because of topographic complexity (including occlusions and large elevation ranges) and variations in image texture. A complete workflow is described from raw data to the treatment and interpretation of results. This is applied to imagery of Val d'Héréns, Switzerland, a landscape containing an assemblage of glacial, periglacial, hillslope and fluvial landforms across a height range of 1800 to 3600 m from the 1960s to the present. These changes reveal important characteristics of landscape scale erosion and deposition at the decadal scale. Numéro de notice : A2015-414 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1111/phor.12099 Date de publication en ligne : 14/05/2015 En ligne : https://doi.org/10.1111/phor.12099 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=76911 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
106-2015021	RAB	Revue	Centre de documentation	En réserve L003	Disponible